A horizontal flow sedimentation tank system with a bottom that is not prone to sludge accumulation
By introducing a sludge buffer tank and dredging pipes into the horizontal flow sedimentation tank system, the problems of siltation at the bottom of the tank and blockage in the pipes were solved, thus simplifying cleaning and improving water quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN JUNHE ENVIRONMENTAL PROTECTION ENG CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional horizontal flow sedimentation tanks are prone to problems such as sludge accumulation at the bottom of the tank, blockage of the sludge discharge pipe, and poor effluent quality in small-scale sewage treatment plants. In addition, traditional cleaning methods are complicated and require the system to be shut down.
Adding a sludge buffer tank to the horizontal sedimentation tank system and connecting it to the sludge buffer tank via a sludge discharge pipe allows for sludge cleaning using a return pump and a dredging pipe, reducing siltation and blockage and simplifying the cleaning process.
It effectively reduces sludge accumulation and pipe blockage, improves effluent quality, simplifies cleaning operations, and reduces the frequency and complexity of system shutdowns.
Smart Images
Figure CN224524037U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment technology, specifically to a horizontal flow sedimentation tank system that is not prone to sludge accumulation at the bottom. Background Technology
[0002] Since the 11th Five-Year Plan, my country has vigorously promoted energy conservation and emission reduction, developed a circular economy, and built a resource-saving and environmentally friendly society. In the field of wastewater treatment, especially industrial wastewater treatment, the market demand for equipment and process systems with good operating performance and simple operation is becoming more and more widespread. Some equipment and processes with high energy consumption and complicated operation and maintenance are increasingly criticized in the industry.
[0003] In some wastewater treatment plants with smaller treatment scales that use traditional horizontal flow sedimentation tanks for sludge-water separation and operate intermittently, the following technical challenges have long been faced: On the one hand, the sludge accumulated at the bottom of the tank reacts under anaerobic conditions, resulting in a large amount of floating sludge on the surface of the sedimentation tank, which seriously affects the quality of the effluent; on the other hand, the sludge discharge pipes are prone to blockage, and traditional cleaning methods (such as draining the tank and disassembling pipe valves) are complicated and require the system to be shut down, which is extremely inconvenient.
[0004] Therefore, it is necessary to propose a horizontal sedimentation tank system that is not prone to sludge accumulation at the bottom to solve the above problems. Utility Model Content
[0005] (a) Technical problems to be solved The purpose of this invention is to provide a horizontal flow sedimentation tank system that is less prone to sludge accumulation at the bottom, in order to solve the problems mentioned in the background art of existing sedimentation tanks, such as floating sludge on the water surface, frequent blockage of the sludge discharge pipe, and poor effluent quality.
[0006] (II) Technical Solution To achieve the above objectives, this utility model is implemented through the following technical solution: a horizontal flow sedimentation tank system that prevents sludge accumulation at the bottom, comprising a sludge buffer tank and a sludge sedimentation tank. The top two sides of the sludge sedimentation tank are respectively provided with an inlet and an outlet. The middle part of the sludge buffer tank is connected to the sludge sedimentation tank through a sludge discharge pipe. The bottom of the sludge sedimentation tank is provided with a sludge hopper. One end of the sludge discharge pipe connected to the sludge sedimentation tank is connected to a sludge outlet pipe extending to the bottom of the sludge hopper. The bottom of the sludge buffer tank is connected to a return pump through a sludge suction pipe. Valves are provided on both the sludge suction pipe and the sludge discharge pipe.
[0007] Preferably, an inlet baffle is fixedly connected to the inlet of the sludge sedimentation tank, and an outlet trough is fixedly connected to the outlet of the sludge sedimentation tank.
[0008] Preferably, there are multiple sludge hoppers, and the bottom ends of two adjacent sludge hoppers are connected by a hopper connecting pipe.
[0009] Preferably, each of the sludge hoppers is equipped with a sludge discharge pipe.
[0010] Preferably, the top end of the mud discharge pipe is connected to a dredging pipe, and the height of the end of the dredging pipe away from the mud discharge pipe is greater than the height of the water outlet.
[0011] Preferably, the sludge discharge pipe is connected to a return pump, and a valve is provided at each port of the sludge discharge pipe.
[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides a horizontal flow sedimentation tank system that is less prone to sludge accumulation at the bottom, and has the following beneficial effects: 1. This horizontal flow sedimentation tank system, which is not prone to sludge accumulation at the bottom, adds a sludge buffer tank to the original horizontal flow sedimentation tank. The sludge discharge pipe is connected to the sludge buffer tank. The system uses a large flow rate of sludge discharge in a short time to remove the sludge accumulated in the sedimentation tank hopper, which greatly reduces the probability of sludge accumulation. This reduces the phenomenon of a large amount of floating sludge on the surface of the sedimentation tank due to sludge blockage of pipes and anaerobic reaction of sludge, thus improving the quality of the effluent.
[0013] 2. This horizontal flow sedimentation tank system, which is not prone to sludge accumulation at the bottom, is equipped with a dredging pipe. If sludge or silt causes blockage of the sludge outlet pipe in special circumstances, the dredging pipe can be connected to a clean water pipe or a flexible rod can be inserted to dredge the blockage. This replaces the traditional complex operation methods such as draining the water tank and disassembling the pipeline, making the dredging process more convenient. Attached Figure Description
[0014] Figure 1 This is a top view of the structure of this utility model; Figure 2 This is a schematic front cross-sectional view of the structure of this utility model; Figure 3 This is a side sectional view of the structure of this utility model.
[0015] In the diagram: 1. Sludge buffer tank; 2. Effluent trough; 3. Sludge sedimentation tank; 4. Sludge hopper connecting pipe; 5. Sludge hopper; 6. Inlet retaining wall; 7. Return pump; 8. Sludge pumping pipe; 10. Sludge discharge pipe; 11. Sludge outlet pipe; 12. Valve; 13. Unblocking pipe. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0017] Please see Figure 1-3As shown, a horizontal flow sedimentation tank system with a bottom that is not prone to sludge accumulation includes a sludge buffer tank 1 and a sludge sedimentation tank 3. The top of the sludge sedimentation tank 3 is provided with an inlet and an outlet on both sides, respectively. The middle part of the sludge buffer tank 1 is connected to the sludge sedimentation tank 3 through a sludge discharge pipe 10. The bottom of the sludge sedimentation tank 3 is provided with a sludge hopper 5. One end of the sludge discharge pipe 10 connected to the sludge sedimentation tank 3 is connected to a sludge discharge pipe 11 extending to the bottom of the sludge hopper 5. The bottom of the sludge buffer tank 1 is connected to a return pump 7 through a sludge suction pipe 8. Both the sludge suction pipe 8 and the sludge discharge pipe 10 are provided with valves 12.
[0018] During the sludge discharge process, first close valve 12 on sludge discharge pipe 10, then use return pump 7 to pump out less or dry sludge buffer tank 1, and then open valve 12 on sludge discharge pipe 10 at the same time. Use pressure difference to discharge sludge in a large flow rate in a short time to carry away the sludge in sludge hopper 5, which greatly reduces the probability of sludge accumulation, and thus reduces the phenomenon of a large amount of floating sludge on the surface of sedimentation tank due to sludge accumulation clogging pipes and sludge anaerobic reaction.
[0019] To reduce the disturbance of the sludge caused by the incoming water, an inlet baffle 6 is fixedly connected to the inlet of the sludge settling tank 3, and an outlet channel 2 is fixedly connected to the outlet of the sludge settling tank 3. During water intake, the inlet baffle 6 physically intercepts and forces a change in flow direction, consuming the kinetic energy of the incoming water and transforming the high-speed, concentrated, and turbulent incoming water into a low-speed, uniform, and stable flow, which is evenly distributed across the entire cross-section of the sludge settling tank 3. This allows the water to enter the settling zone at a lower and more uniform flow rate, reducing disturbance to the bottom sludge. During effluent discharge, the settled wastewater in the sludge settling tank 3 overflows into the outlet channel 2 and is then discharged from the outlet.
[0020] Specifically, there are multiple sludge hoppers 5, and the bottom ends of two adjacent sludge hoppers 5 are connected by a hopper connecting pipe 4. Each sludge hopper 5 is equipped with a sludge discharge pipe 11. Because the bottom area of the sludge sedimentation tank 3 is large and the sludge settling position is dispersed, multiple sludge hoppers 5 are set to divide the bottom of the tank into several independent sludge collection areas, so that the settled sludge slides into the nearest hopper, avoiding sludge resuspension caused by long-distance pushing; the conical structure of the sludge hopper 5 forms an inverted conical space, where the sludge is naturally compressed and water is squeezed out, achieving gravity concentration; the inclined design of the hopper wall promotes automatic sludge sliding and reduces the need for manual cleaning; the hopper connecting pipe 4 connects multiple sludge hoppers 5, and the sludge can be automatically adjusted and distributed according to its flowability, avoiding the overflow of one hopper while other hoppers are not fully utilized.
[0021] To facilitate the cleaning of sludge clogging the sludge discharge pipe 11, a dredging pipe 13 is connected to the top of the sludge discharge pipe 11. The height of the end of the dredging pipe 13 furthest from the sludge discharge pipe 11 is greater than the height of the water outlet. During cleaning, the dredging pipe 13 can be connected to a clean water pipe or a flexible rod can be inserted into it for dredging, thus replacing the complex dredging methods of traditionally draining the water tank and disassembling the pipes, making cleaning and dredging much more convenient. When dredging by connecting to a clean water pipe, the valve 12 on the sludge discharge pipe 10 should be closed.
[0022] Specifically, the sludge discharge pipe 10 is connected to the return pump 7, and a valve 12 is provided at each port of the sludge discharge pipe 10. By connecting the sludge discharge pipe 10 to the return pump 7, sludge in the sludge sedimentation tank 3 can be directly extracted through the return pump 7 during the cleaning and maintenance of the sludge buffer tank 1; when using the sludge buffer tank 1 for sludge discharge, the valve 12 at the end of the sludge discharge pipe 10 connected to the return pump 7 is in the closed state.
[0023] This system is used for wastewater treatment projects with small water volumes. Compared with traditional horizontal flow sedimentation tanks, it has the advantages of low sludge accumulation at the bottom, less floating mud on the water surface, and easy unblocking when pipes are blocked.
[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A horizontal flow sedimentation tank system that prevents sludge accumulation at the bottom, characterized in that, The sludge buffer tank (1) and sludge sedimentation tank (3) are provided with an inlet and an outlet on the top two sides of the sludge sedimentation tank (3), respectively. The middle part of the sludge buffer tank (1) is connected to the sludge sedimentation tank (3) through a sludge discharge pipe (10). The bottom end of the sludge sedimentation tank (3) is provided with a sludge hopper (5). The end of the sludge discharge pipe (10) connected to the sludge sedimentation tank (3) is connected to a sludge discharge pipe (11) extending to the bottom of the sludge hopper (5). The bottom end of the sludge buffer tank (1) is connected to a return pump (7) through a sludge suction pipe (8). Both the sludge suction pipe (8) and the sludge discharge pipe (10) are provided with valves (12).
2. The horizontal flow sedimentation tank system with minimal sludge accumulation at the bottom according to claim 1, characterized in that: The sludge sedimentation tank (3) is fixedly connected to an inlet baffle wall (6) and the sludge sedimentation tank (3) is fixedly connected to an outlet trough (2).
3. A horizontal flow sedimentation tank system with a bottom that is not prone to sludge accumulation, as described in claim 1, is characterized in that: There are multiple sludge hoppers (5), and the bottom ends of two adjacent sludge hoppers (5) are connected by a hopper connecting pipe (4).
4. A horizontal flow sedimentation tank system with a bottom that is not prone to sludge accumulation, as described in claim 3, is characterized in that: Each of the sludge hoppers (5) is equipped with a sludge discharge pipe (11).
5. A horizontal flow sedimentation tank system with a bottom that is not prone to sludge accumulation, as described in claim 1, is characterized in that: The top end of the mud discharge pipe (11) is connected to a dredging pipe (13), and the height of the end of the dredging pipe (13) away from the mud discharge pipe (11) is greater than the height of the water outlet.
6. A horizontal flow sedimentation tank system with a bottom that is not prone to sludge accumulation, as described in claim 1, is characterized in that: The sludge discharge pipe (10) is connected to the return pump (7), and a valve (12) is provided at each port of the sludge discharge pipe (10).